Q: What is the answer to 4a - 5 equals 7a - 7?

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7a2 + 53a + 28 = 7a2 + 49a + 4a + 28 = 7a(a + 7) +4(a + 7) = (a + 7)(7a + 4)

a=5

(7a + 35)/-7 = 7(a + 5)/-7 = -(a + 5) = (-a - 5)

3a + 4a +/- 6; take the 3a & 4a and combine them; 7a +/- 6 would be your answer as 6 cannot combine with 7a due to the variable. If 7a +/- 6 = 0, then subtract/add (respectively) the 6 depending on the operation. Therefore 7a + 6 = 0 turns to 7a = -6. Divide the 7 with the -6 to get the a alone; a = -6/7 or -0.8. Cannot be simplified.

a/7 + a/4 = 4a/28 + 7a/28 = 11a/28

17

4a - 5b = 74a +5b = 17From the first equation:4a = 7 + 5bsubstitute this value in the second equation:7 + 5b + 5b = 177 + 10b = 1710b = 10b = 1Now,solve for a :4a - 5(1) = 74a = 7 + 54a = 12a = 3

The value of a is -7

Combine like terms, adding/subtracting the coefficients: (5a² + 6a + 2) + (7a² - 7a + 5) = (5+7)a² + (6-7)a + (2+5) = 12a² - a + 7 (5a² + 6a + 2) - (7a² - 7a + 5) = (5a² + 6a + 2) + (-7a² + 7a - 5) = (5-7)a² + (6+7)a + (2-5) = -2a² + 13a - 3

It is an equation and the value of a is 7

a2 + 7a - 8a2 = 6a7 ∴ a2 + 7a - 8a2- 6a7 = 0 ∴ a + 7 - 8a - 6a6 = 0 ∴ 7 - 7a - 6a6 = 0 ∴ 6a6 + 7a - 7 = 0

11a + 9 = 4a + 30Subtract 9 from both sides to get: 11a = 4a + 21Subtract 4a from both sides to get:7a = 21Divide both sides by 7 to get:a = 3And there's your answer: a = 3

7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2

7

Add the equations: 4a + 4a - 5b + 5b = 7 + 17 ie 8a = 24 a = 3, so b = 1

42, because if there is nothing between the 7 and 'a' and 'a' equals 6 then the answer is 42.

The equation cannot be solved as there are two unknowns. However it can be simplified and the two unknowns (a and b) expressed in terms of the second unknown. 1) Expressing a in terms of b 4a + 2 = 3b - 5 4a = 3b -7 if desired this could be stated as a = (3b - 7)/4 2) Expressing b in terms of a 3b - 5 = 4a + 2 3b = 4a + 7 if desired this could be stated as b = (4a + 7)/3

20a+10b-35

(1) 4a-5b=7 (2) 4a+5b=17 (1)-(2) gives 4a-5b-(4a+5b)=7-17 then -10b=-10 so b=1 from (2) one gets 4a=17-5b=17-5x1=12 so a=3 (3,1) is the solution

7a=2(-10)........................................answer is 20/7

7a-7 = 7(a-1).

a/5 + a/2 = 14/2 2a/10 + 5a/10 = 7 7a/10 = 7 7a = 70 a = 10

is that ment to be a > sign? well if it is3a>4a-5 (-4a)-a>-5 then just inverta>5

2a+5a=3 7a=3 a=3/7 or .4286

If you mean: 4a-3 = 2a+7 then the value of a works out as 5

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